Possible incorrect results from OBJECT_ functions

SELECT COUNT(1)

FROM OBJECT TO_STR(pos): {"a": OBJECT TO_STR(pos2): {"c":v} FOR pos2:v1 IN ARRAY_RANGE(0,50) END} FOR pos:v IN ARRAY_RANGE(0,50) END AS d

UNNEST OBJECT_VALUES(d) AS u1

UNNEST OBJECT_VALUES(u1.a) AS u2

UNNEST OBJECT_NAMES(d) AS u3;